Please, please can anyone help me. I have a one year old Dogue De Bordeaux. and she is losing weight rapidly. She will eat her full amount for about five days and then she will go all sulky for three or four days and will not eat anything at all.She as done this since being a puppy but she seems to be getting worse. Also could anyone give good advice about getting some weight on her. Please can you help as this is causing me a great deal of stress.